Numerical Simulation of Explosive Forming Using Detonating Fuse

H Iyama, Y Higa, M Nishi, S Itoh

Abstract


The explosive forming is a characteristic method. An underwater shock wave is generated by underwater explosion of an explosive. A metal plate is affected high strain rate by the shock loading and is formed along a metal die. Although this method has the advantage of mirroring the shape of the die, a free forming was used in this paper. An expensive metal die is not necessary for this free forming. It is possible that a metal plate is formed with simple supporting parts. However, the forming shape is depend on the shock pressure distribution act on the metal plate. This pressure distribution is able to change by the shape of explosive, a mass of explosive and a shape of pressure vessel.

On the other hand, we need the pressure vessel for food processing by the underwater shock wave. Therefore, we propose making the pressure vessel by this explosive forming. One design suggestion of pressure vessel made of stainless steel was considered. However, we cannot decide suitable conditions, the mass of the explosive and the distance between the explosive and the metal plate to make the pressure vessel. In order to decide these conditions, we have tried the numerical simulation on this explosive forming. The basic simulation method was ALE (Arbitrary Laglangian Eulerian) method including with Mie-Grümeisen EOS (equation of state), JWL EOS, Johnson-Cook constitutive equation for a material model. In this paper, the underwater pressure contours to clear the propagations of the underwater shock wave, forming processes and deformation velocity of the metal plate is shown and it will be discussed about those results.

 


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References


Shimojima, K., Miyafuji, Y., Naha, K., Higa, O., Matsubara, R., Higa, K., Higa, Y., Matsui, T., Takemoto, A., Tanaka, S., Maehara, H., and Itoh, S., The International Journal of Multiphysics, 2012, Vol.6, No.4, pp.355-364. Crossref

Lee, E., Finger, M., and Collins, W., Lawrence Livermore National Laboratory report, 1972, UCID-16189, Livermore, CA.

Aquelet,N., Souli, M., and Olovsson, L., , Application to slamming problems, Computer methods in applied mechanics and engineering, 2006, 195, pp. 110-132. Crossref

McQueen, G., Marsh, S. P., Taylor, J. W., Fritz, J. N., and Carter, W. J., High-Velocity-Impact Phenomena, 1970, p.230, Academic Press, NY.

Meyers, M. A., Dynamic Behavior of Materials, , Wiley-Interscience, NY , 1994, pp. 327-328.

Itoh, S., Nagano, S., Hamada, T., Murata, K. and Kato, Y., Proc. of Kyushu Local Symposium, Japan Society of Mechanical Engineers, 2000, Vol.8, No.2, pp.61-62.




DOI: http://dx.doi.org/10.21152/1750-9548.11.3.233

Copyright (c) 2017 H Iyama, Y Higa, M Nishi, S Itoh

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